6638960 has 40 divisors (see below), whose sum is σ = 15939456. Its totient is φ = 2568960.

The previous prime is 6638953. The next prime is 6638977. The reversal of 6638960 is 698366.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1142 + ... + 3818.

Almost surely, 2^6638960 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6638960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7969728).

6638960 is an abundant number, since it is smaller than the sum of its proper divisors (9300496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6638960 is a wasteful number, since it uses less digits than its factorization.

6638960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721 (or 2715 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 6638960 is about 2576.6179383059. The cubic root of 6638960 is about 187.9461140266.

The spelling of 6638960 in words is "six million, six hundred thirty-eight thousand, nine hundred sixty".